diff --git a/codex-rs/tui/src/terminal_palette.rs b/codex-rs/tui/src/terminal_palette.rs
index 4ce2d1d147..097eff1578 100644
--- a/codex-rs/tui/src/terminal_palette.rs
+++ b/codex-rs/tui/src/terminal_palette.rs
@@ -1,6 +1,7 @@
 use crate::color::perceptual_distance;
 use ratatui::style::Color;
 use std::sync::LazyLock;
+#[cfg(windows)]
 use std::sync::OnceLock;
 use std::sync::Mutex;